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'\" Copyright (c) 1990 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
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.so man.macros
.TH Tk_MainWindow 3 7.0 Tk "Tk Library Procedures"
.BS
.SH NAME
Tk_MainWindow \- find the main window for an application
.SH SYNOPSIS
.nf
\fB#include <tk.h>\fR
.sp
Tk_Window
\fBTk_MainWindow\fR(\fIinterp\fR)
.SH ARGUMENTS
.AS Tcl_Interp *pathName
.AP Tcl_Interp *interp in/out
Interpreter associated with the application.
.BE

.SH DESCRIPTION
.PP
If \fIinterp\fR is associated with a Tk application then \fBTk_MainWindow\fR
returns the application's main window.
If there is no Tk application associated with \fIinterp\fR then
\fBTk_MainWindow\fR returns NULL and leaves an error message
in \fIinterp->result\fR.

.SH KEYWORDS
application, main window